f("foo" in m);
f(!("foo" in m));
f(!!g);
f(!!foo());
f(!0);
f(!0);
f(!0);
f(!!(x - y));
f(x == y);
f(x === y);
f(x < y);
f(x <= y);
f(x > y);
f(x >= y);
f(!g);
f(!foo());
f(!1);
f(!1);
f(!1);
f(!(x - y));
f(x != y);
f(x !== y);
f(!(x < y));
f(!(x <= y));
f(!(x > y));
f(!(x >= y));
